org.apache.avro.tool.DataFileWriteTool Maven / Gradle / Ivy

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.apache.avro.tool;

import java.io.EOFException;
import java.io.InputStream;
import java.io.DataInputStream;
import java.io.PrintStream;
import java.util.List;

import joptsimple.OptionParser;
import joptsimple.OptionSet;
import joptsimple.OptionSpec;

import org.apache.avro.Schema;
import org.apache.avro.file.CodecFactory;
import org.apache.avro.file.DataFileWriter;
import org.apache.avro.io.DatumReader;
import org.apache.avro.generic.GenericDatumReader;
import org.apache.avro.generic.GenericDatumWriter;
import org.apache.avro.io.Decoder;
import org.apache.avro.io.JsonDecoder;

/** Reads new-line delimited JSON records and writers an Avro data file. */
public class DataFileWriteTool implements Tool {

  @Override
  public String getName() {
    return "fromjson";
  }

  @Override
  public String getShortDescription() {
    return "Reads JSON records and writes an Avro data file.";
  }

  @Override
  public int run(InputStream stdin, PrintStream out, PrintStream err,
      List args) throws Exception {

    OptionParser p = new OptionParser();
    OptionSpec codec =
      p.accepts("codec", "Compression codec")
      .withRequiredArg()
      .defaultsTo("null")
      .ofType(String.class);
    OptionSet opts = p.parse(args.toArray(new String[0]));

    if (opts.nonOptionArguments().size() != 2) {
      err.println("Expected 2 args: schema input_file");
      p.printHelpOn(err);
      return 1;
    }

    Schema schema = Schema.parse(args.get(0));
    DatumReader